We use cookies to offer you a better browsing experience, analyze site traffic, personalize content, and serve targeted advertisements. Read about how we use cookies and how you can control them by clicking "Cookie Settings." If you continue to use this site, you consent to our use of cookies.

Privacy Preference Center

Acquia’s websites may request cookies to be set on your device. We use cookies to enrich and personalize your user experience. Cookies help us know when you visit our websites, how you interact with us, and what content you view, so we can customize your experience with Acquia, including offering you more relevant content and advertising. You can also change your cookie preferences. Note, that blocking some types of cookies may impact your experience on our websites and the services we are able to offer.

Essential Website Cookies:
These cookies are strictly necessary to provide you with services available through our websites and to use some of its features (such as access to secure areas). Since these cookies are strictly necessary to deliver the websites, you cannot refuse them without impacting your experience and how our websites function. You can block or delete them by changing your browser settings, as described under the heading "How can I control cookies?" in the Cookie Policy.

Non-Essential Website Cookies:
These cookies collect information that is used to help us understand how our websites are being used, how effective our marketing campaigns are, or to help us customize our websites and applications to enhance your experience. You can click below to remove these cookies from your website experience. However, without these cookies, certain functionality may become unavailable or unusable.

Acquia blocks 500,000 attack attempts for SA-CORE-2018-002

On March 28, the Drupal Security Team released a bug fix for a critical security vulnerability, named SA-CORE-2018-002. Over the past week, various exploits have been identified, as attackers have attempted to compromise unpatched Drupal sites. Hackers continue to try to exploit this vulnerability, and Acquia's own security team has observed more than 100,000 attacks a day.

The SA-CORE-2018-002 security vulnerability is highly critical; it allows an unauthenticated attacker to perform remote code execution on most Drupal installations. When the Drupal Security Team made the security patch available, there were no publicly known exploits or attacks against SA-CORE-2018-002.

That changed six days ago, after Checkpoint Research provided a detailed explanation of the SA-CORE-2018-002 security bug, in addition to step-by-step instructions that explain how to exploit the vulnerability. A few hours after Checkpoint Research's blog post, Vitalii Rudnykh, a Russian security researcher, shared a proof-of-concept exploit on GitHub. Later that day, Acquia's own security team began to witness attempted attacks.

The article by Checkpoint Research and Rudnykh's proof-of-concept code have spawned numerous exploits, which are written in different programming languages such as Ruby, Bash, Python and more. As a result, the number of attacks have grown significantly over the past few days.

Fortunately, Acquia deployed a platform level mitigation for all Acquia Cloud customers one hour after the Drupal Security Team made the SA-CORE-2018-002 release available on March 28. Over the past week, Acquia has observed over 500,000 attacks from more than 3,000 different IP addresses across our fleet of servers and customer base. To the best of our knowledge, every attempted exploitation of an Acquia customer has failed.

Get updates

Receive the best content about the future of digital marketing, industry shifts, and other thought leadership.

The scale and the severity of this attack suggests that if you failed to upgrade your Drupal sites, or your site is not supported by Acquia Cloud or another trusted vendor that provides platform level fixes, the chances of your site being hacked are very high. If you haven't upgraded your site yet, I recommend that you restore from a backup taken before the vulnerability was announced and upgrade before putting your site back online. (Update: restoring a Drupal site from backup may not be sufficient as some of the exploits reinstall themselves from crontab. You should assume the whole host is compromised.)

Drupal's responsible disclosure policy

It's important to keep in mind that all software has security bugs, and fortunately for Drupal, critical security bugs are rare. It's been nearly four years since the Drupal Security Team published a security release for Drupal core that is this critical.

What matters is how software projects or software vendors deal with security bugs. The Drupal Security Team follows a "coordinated disclosure policy": issues remain private until there is a published fix. A public announcement is made when the threat has been addressed and a secure version of Drupal core is also available. Even when a bug fix is made available, the Drupal Security Team is very thoughtful with its communication. The team is careful to withhold as many details about the vulnerability as possible to make it difficult for hackers to create an exploit, and to buy Drupal site owners as much time as possible to upgrade. In this case, Drupal site owners had two weeks before the first public exploits appeared.

Historically, many proprietary CMS vendors have executed a different approach, and don't always disclose security bugs. Instead, they often fix bugs silently. In this scenario, secrecy might sound like a good idea; it prevents sites from being hacked and it avoids bad PR. However, hiding vulnerabilities provides a false sense of security, which can make matters much worse. This approach also functions under the assumption that hackers can't find security problems on their own. They can, and when they do, even more sites are at risk of being compromised.

Drupal's approach to security is best-in-class — from fixing the bug, testing the solution, providing advance notice, coordinating the release, being thoughtful not to over communicate too many details, being available for press inquiries, and repeatedly reminding everyone to upgrade.

Acquia's platform level fix

In addition to the Drupal Security Team's responsible disclosure policy, Acquia's own security team has been closely monitoring attempted attacks on our infrastructure. Following the release of the Checkpoint Research article, Acquia has tracked the origin of the 500,000 attempted attacks:

This image captures the geographic distribution of SA-CORE-2018-002 attacks against Acquia's customers. The number denoted in each bubble is the total number of attacks that came from that location.

To date, over 50 percent of the attempted attacks Acquia has witnessed originate from the Ukraine:

At Acquia, we provide customers with automatic security patching of both infrastructure and Drupal code, in addition to platform level fixes for security bugs. Our commitment to keeping our customers safe is reflected in our push to release a platform level fix one hour after the Drupal Security Team made SA-CORE-2018-002 available. This mitigation covered all customers with Acquia Cloud Free, Acquia Cloud Professional, Acquia Cloud Enterprise, and Acquia Cloud Site Factory applications; giving our customers peace of mind while they upgraded their Drupal sites, with or without our help. This means that when attempted exploits and attacks first appeared in the wild, Acquia's customers were safe. As a best practice, Acquia always recommends that customers upgrade to the latest secure version of Drupal core, in addition to platform mitigations.

Dries Buytaert

Chairman, Chief Technology Officer Acquia, Inc.

Dries Buytaert is an open source developer and technology executive. He is the original creator and project lead for Drupal, an open source platform for building websites and digital experiences. Buytaert is also co-founder and chief technology officer of Acquia, a venture-backed technology company. Acquia provides an open cloud platform to many large organizations, which helps them build, deliver and optimize digital experiences. A Young Global Leader at the World Economic Forum, he holds a PhD in computer science and engineering from Ghent University and a Licentiate Computer Science (MsC) from the University of Antwerp. He was named CTO of the Year by the Massachusetts Technology Leadership Council, New England Entrepreneur of the Year by Ernst & Young, and a Young Innovator by MIT Technology Review. He blogs frequently on Drupal, open source, startups, business, and the future at dri.es.